How to debug access to properties in foreign classes...

gistfile1.py

def _debug_property():
    def getter(self):
        traceback.print_stack()
        return self._property

    def setter(self, value):
        traceback.print_stack()
        print "value = %d" % value
        self._property = value

    return property(getter, setter)


def _add_debug_prop(inst, name):
    cls = type(inst)
    if not hasattr(cls, '__debug_property'):
        cls = type(cls.__name__, (cls,), {})
        cls.__debug_property = True
        inst.__class__ = cls
    setattr(cls, name, _debug_property())

import module
my_inst = module.SomeClass()
_add_debug_prop(my_inst, 'property_name')